Structures of Molecular Nitrogen at High Pressures
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We have studied structural properties of the high pressure phases of molecular nitrogen at room temperature using synchrotron radiation and angle dispersive powder diffraction with image plates as detectors. The cubic δ-phase was found to be stable between 5 and 11 GPa. At 11 GPa a phase transition to a new tetragonal phase was observed. Structural refinements suggest, that the transition is due to an orientational ordering of the disklike disordered molecules of the δ-phase. At 16. 5 GPa the transition to the rhombohedral ε-phase occurred.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 787-789, 1998
The Japan Society of High Pressure Science and Technology